CN107054332B - A kind of air-pressure electric-control braking system and braking method with fail safe function - Google Patents
A kind of air-pressure electric-control braking system and braking method with fail safe function Download PDFInfo
- Publication number
- CN107054332B CN107054332B CN201710430758.2A CN201710430758A CN107054332B CN 107054332 B CN107054332 B CN 107054332B CN 201710430758 A CN201710430758 A CN 201710430758A CN 107054332 B CN107054332 B CN 107054332B
- Authority
- CN
- China
- Prior art keywords
- valve
- gas
- brake
- control
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/58—Combined or convertible systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
Abstract
The present invention provides a kind of air-pressure electric-control braking system and braking method with fail safe function; system of the present invention eliminates the front and back axle relay valve gas control structure in existing air-pressure electric-control braking system; it is acted on by the power-off return of counterbalance valve; so that the high pressure gas of third gas receiver is directly controlled the second relay valve opening by counterbalance valve, so that the high pressure gas of third gas receiver is directly over the second relay valve and reach in four brake chambers of front-rear axle；Therefore technical solution of the present invention is smaller to the dependence of the proportion relay valve and rear axle bridge control valve of preceding bridge, does not need above-mentioned valve and has gas control function, reduces system cost；And due in braking system of the present invention failure braking gas circuit separate with conventional brake gas circuit, serious forgiveness of former bridge proportion relay valve when breaking down with rear axle bridge control valve it is higher, the insensitivity that fails is stronger.
Description
Technical field
The invention belongs to brake system of car technical fields, are more related to a kind of air-pressure electric-control with fail safe function
Braking system and braking method.
Background technique
Commercial vehicle since its weight is larger, when braking it is required braking moment it is larger, so usually using be capable of providing compared with
The air-pressure brake mode of high brake pressure brakes it.
Traditional commercial vehicle Pneumatic braking system is usually by portions such as air compressor, gas receiver, relay valve, dual-chamber brakes
It being grouped as, basic principle is to step on brake pedal by driver, the air inlet of dual-chamber brake is connected with gas outlet,
To make the high pressure gas in gas receiver enter front and back brake chamber by brake valve, the braking process of commercial vehicle is realized.
But due to factors such as the compressibilities of gas, there is apparent braking sluggishness and ask in traditional Pneumatic braking system
Topic, causes conventional gas braking system to have in the accuracy of braking clearly disadvantageous.With the development of automotive electronic technology, gas
Voltage control braking system (EBS-Electronically Braking System) has gradually developed, due to air-pressure electric-control system
Dynamic system replaces some mechanical element to obtain braking response speed by using electronic control technology by using electric control element
It is larger raising and braking accuracy it is higher.
Current air-pressure electric-control braking system generallys use gas control and automatically controlled double loop to guarantee entire braking system just
Often work.But current air-pressure electric-control braking system is protected the relay valve of front-rear axle using gas control mode when failing braking
Service brake is demonstrate,proved, keeps it larger to the relay valve dependence of front-rear axle, and the relay valve of front-rear axle is needed to have gas control function, therefore
The relay valve of its front-rear axle needs stability with higher, so that the manufacture and maintenance cost of entire braking system are increased,
And serious forgiveness when front and back axle relay valve transmission failure is poor, failure insensitivity is insufficient.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the present invention provides a kind of, and the air pressure with fail safe function is electric
Braking system and braking method are controlled, the failure insensitivity of air-pressure electric-control braking system is improved.In conjunction with Figure of description, originally
The technical solution of invention is as follows:
A kind of air-pressure electric-control braking system with fail safe function, is made of, gas circuit pneumatic circuit and electric control circuit
Third gas receiver 4, the second gas receiver 5 and the first gas receiver 6 are respectively enterd after four-loop protection valve 3 from air compressor 1,
The pneumatic circuit includes conventional brake circuit, parking brake loop and failure brake circuit；
The failure brake circuit are as follows: the gas outlet of the first gas receiver 6 and the second gas receiver 5 connect main brake valve 9 after with
Two control mouths of the second relay valve 32 are connected, the gas outlet of third gas receiver 4 connect after standby pressure valve 33 with the second relay valve 32
Air inlet be connected, a gas outlet of the second relay valve 32 is separately connected after corresponding two check valves of rear wheel and rear wheel
Two brake chambers connection, after another gas outlet of the second relay valve 32 is separately connected corresponding two check valves of rear wheel
It is connect with two brake chambers of rear wheel.
The conventional brake circuit are as follows: 6 gas outlet of the first gas receiver respectively with main brake valve 9 and proportion relay valve 29 into
Port is connected, and two gas outlets of proportion relay valve 29 pass through two braking gas of the first ABS solenoid valve 19 and front vehicle wheel respectively
Room is connected, and the gas outlet of the second gas receiver 5 is connected with the air inlet of main brake valve 9 and bridge control valve 31 respectively, and the two of bridge control valve 31
A gas outlet is connected by two brake chambers with rear wheel respectively, between corresponding two brake chambers of forward and backward wheel
It is connected by two check valves, realizes the independent pressure regulation braking of two brake chambers.
The parking brake loop are as follows: 4 gas outlet of the third gas receiver air inlet with parking brake 14 and the first relay valve 13 respectively
Mouth is connected, and the gas outlet of parking brake 14 is connected with another air inlet of the first relay valve 13, the gas outlet difference of the first relay valve 13
It is connect after corresponding two check valves of connection rear wheel with two brake chambers of rear wheel.
The electric control circuit is by center ECU 43, two ABS solenoid valve 19, four wheel speed sensors, main brake valve 9, ratio
Relay valve 29, bridge control valve 31 and standby pressure valve 33 form, and center ECU 43 is electric with the automatically controlled port 903 of main brake valve, bridge control valve respectively
It controls interface 314, be connected for the automatically controlled end of the automatically controlled port 333 of pressure valve, automatically controlled 294, the two ABS solenoid valves in port of proportion relay valve；
Center ECU 43 is connect with proportion relay valve CAN interface 295 and bridge control valve CAN interface 315 by CAN bus respectively；Front-wheel is corresponding
Two wheel speed sensors be connected with proportion relay valve sensor interactive interface 296.
A kind of air-pressure electric-control braking method with fail safe function, the braking method include conventional brake method,
Parking braking method and failure braking method；
The failure braking method detailed process are as follows:
When under braking system power-off failure state, main brake valve 9 and standby pressure valve 33 are both turned on；
High pressure gas in air compressor 1 enters the first gas receiver 6,5 and of the second gas receiver after four-loop protection valve 3
In third gas receiver 4, the gas for entering the first gas receiver 6 and the second gas receiver 5 at this time enters the second servo by main brake valve 9
The second relay valve 32 is connected in the control mouth of valve 32, and the gas into third gas receiver 4 passes through standby pressure valve 33 into the second servo
The air inlet of valve 32；High pressure gas from a gas outlet of the second relay valve 32 outflow enter after a check valve respectively before
In two brake chambers of wheel, realize that pressure is built in the braking of the failure to two front-wheels；High pressure gas is another from the second relay valve 32
A gas outlet outflow enters after a check valve respectively in two brake chambers of rear-wheel, realizes the failure to two rear-wheels
Pressure is built in braking.
The conventional brake method detailed process are as follows:
When braking system work is under conventional brake state, the energization of proportion relay valve 29 of bridge is led before center ECU 43 controls
Logical, the bridge control valve 33 for controlling rear axle, which is powered, to be connected, and control is powered for pressure valve 33 and is connected and is directly connected with atmosphere, controls and brakes always
The work of valve 9 is not turned on control main brake valve 9 in automatically controlled mode；
High pressure gas in air compressor 1 enters the first gas receiver 6 and the second gas receiver 5 after four-loop protection valve 3
In, after passing through proportion relay valve 29 into the gas of the first gas receiver 6 at this time, before entering after an ABS solenoid valve respectively
In two brake chambers of wheel, realize that pressure is built in the braking of the failure to two front-wheels；Gas into the second gas receiver 5 passes through bridge control
It after valve 31, respectively enters in two brake chambers of rear-wheel, realizes that pressure is built in the braking of the failure to two rear-wheels；
In the above process, after the wheel speed signal that center ECU detects the wheel speed sensors of four wheels is handled, point
The bridge control valve of the ABS solenoid valve of bridge and rear axle does not send corresponding control signal forward, and then realizes the ABS system to four wheels
Dynamic control；
Two lists between two brake chambers of front-wheel between two brake chambers of rear-wheel by installing opposite to each other
To the one-way conduction of valve, the independent pressure regulation braking between two brake chambers is realized.
The parking braking method detailed process are as follows:
When braking system work is under parking braking state, automobile only brakes vehicle rear axle by parking brake 14 at this time
Control, the power-off of the bridge control valve 31 of the proportion relay valve 29 of bridge and rear axle is not turned on before center ECU 43 controls, and controls standby pressure valve 33
It is powered and is connected and is directly connected with atmosphere, the work of control main brake valve 9 is not turned on control main brake valve 9 in automatically controlled mode；
High pressure gas in air compressor 1 enters in third gas receiver 4 after four-loop protection valve 3, then respectively enters
In the air inlet of parking brake 14 and the first relay valve 13, flows through 14 high pressure gas of parking brake and enters in the control mouth of the first relay valve 13,
13 spool of the first relay valve is connected, the high pressure gas for flowing through the first relay valve 13 enters rear-wheel after a check valve respectively
Two brake chambers in, realization pressure is built to the parking braking to two rear-wheels.
Compared with prior art, the beneficial effects of the present invention are:
1. a kind of air-pressure electric-control braking system with fail safe function of the present invention is in brake system non-functional,
The front and back axle relay valve gas control structure in existing air-pressure electric-control braking system is eliminated, is acted on by the power-off return of standby pressure valve,
So that the high pressure gas of third gas receiver is passed through standby pressure valve and directly control the second relay valve opening, makes the high pressure gas of third gas receiver
The second relay valve is directly over to reach in four brake chambers of front-rear axle；Therefore technical solution of the present invention is to the ratio of preceding bridge
The dependence of relay valve and rear axle bridge control valve is smaller, does not need above-mentioned valve and has gas control function, reduces system cost；And due to
Failure braking gas circuit is separated with conventional brake gas circuit in braking system of the present invention, bridge proportion relay valve and rear axle bridge before institute
Serious forgiveness when control valve breaks down is higher, and failure insensitivity is stronger.
2. a kind of air pressure EBS system with fail safe function of the present invention passes through parking brake in parking braking
The first relay valve opening is controlled, so that third gas receiver be made directly to provide brake pressure for two brake chambers on rear axle, is made
Braking system of the present invention insensitivity in parking braking is preferable.
3. a kind of rear axle of air pressure EBS system with fail safe function of the present invention is by using bridge control valve generation
For the rear axle proportion relay valve and ABS solenoid valve in EBS system, integration is preferable, and electric wire connection is more succinct, saves cloth
Between emptying.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the air-pressure electric-control braking system of the present invention with fail safe function；
Fig. 2 is that the main brake valve interface in the air-pressure electric-control braking system of the present invention with fail safe function shows
It is intended to；
Fig. 3 is that the four-loop protection valve in the air-pressure electric-control braking system of the present invention with fail safe function connects
Mouth schematic diagram；
Fig. 4 is the bridge control valve interface signal in the air-pressure electric-control braking system of the present invention with fail safe function
Figure；
Fig. 5 is the proportion relay valve interface in the air-pressure electric-control braking system of the present invention with fail safe function
Schematic diagram；
Fig. 6 is the standby pressure valve interface signal in the air-pressure electric-control braking system of the present invention with fail safe function
Figure；
Fig. 7 is the first relay valve interface in the air-pressure electric-control braking system of the present invention with fail safe function
Schematic diagram；
Fig. 8 is the second relay valve interface in the air-pressure electric-control braking system of the present invention with fail safe function
Schematic diagram；
Fig. 9 is the air-pressure electric-control braking system of the present invention with fail safe function, air pressure when conventional brake
Figure；
Figure 10 is the air-pressure electric-control braking system of the present invention with fail safe function, air pressure when failure is braked
Figure；
Figure 11 is the air-pressure electric-control braking system of the present invention with fail safe function, air pressure when parking braking
Figure.
In figure:
1 air compressor, 2 driers, 3 four-loop protection valves,
4 third gas receivers, 5 second gas receivers, 6 first gas receivers,
7 first threeways, 8 second threeways, 9 main brake valves,
Brake chamber behind 10 right sides, 11 off hind wheels, 12 first wheel speed sensors,
13 first relay valves, 14 parking brakes, 15 four-ways,
Brake chamber before 16 right sides, 17 off-front wheels, 18 second wheel speed sensors,
19 the oneth ABS solenoid valves, 20 third threeways, 21 first check valves,
22 the 4th threeways, 23 second one-way valves, 24 the near front wheels,
25 third wheel speed sensors, 26 left front brake chambers, 27 the 5th threeways,
28 the 2nd ABS solenoid valves, 29 proportion relay valves, 30 the 6th threeways,
31 bridge control valves, 32 second relay valves, 33 for pressure valve,
34 fourth round speed sensors, 35 left rear wheels, 36 left back brake chambers,
37 the 7th threeways, 38 third check valves, 39 the 8th threeways,
40 the 9th threeways, 41 the 4th check valves, 42 the tenth threeways,
43 center ECUs；
131 first relay valve air inlets, 132 first the first gas outlets of relay valve, 133 first the second gas outlets of relay valve,
134 first relay valve control mouths；
291 proportion relay valve air inlets, 292 the first gas outlets of proportion relay valve, 293 the second gas outlets of proportion relay valve,
294 proportion relay valve sensor interactive interfaces, 295 proportion relay valve CAN interfaces, the automatically controlled port of 296 proportion relay valves,
301 four-loop protection valve air inlets, 302 the first gas outlets of four-loop protection valve, 303 the second gas outlets of four-loop protection valve,
304 four-loop protection valve third gas outlets, the 4th gas outlet of 305 four-loop protection valve, 311 the first gas outlets of bridge control valve,
312 bridge control the first air inlets of valve, 313 bridge control valve third gas outlets, the 314 automatically controlled interfaces of bridge control valve,
315 bridge control valve CAN interfaces, the 4th gas outlet of 316 bridge control valve, 317 bridge control the second air inlets of valve,
318 the second gas outlets of bridge control valve, 319 bridge control valve sensor interactive interfaces, 321 second relay valve air inlets,
322 second the first gas outlets of relay valve, 323 second the second gas outlets of relay valve, 324 second the first control mouths of relay valve,
325 second the second control mouths of relay valve, 331 for pressure valve air inlet, and 332 for pressure valve gas outlet,
333 for the automatically controlled port of pressure valve；
901 the first air inlets of main brake valve, 902 the second air inlets of main brake valve, the automatically controlled port of 903 main brake valves,
904 the first gas outlets of main brake valve, 905 the second gas outlets of main brake valve.
Specific embodiment
For the technical solution that the present invention is further explained, in conjunction with Figure of description, a specific embodiment of the invention is as follows:
As shown in Figure 1, the present invention provides a kind of air-pressure electric-control braking system with fail safe function, including air
Compressor 1, drier 2, four-loop protection valve 3, third gas receiver 4, the second gas receiver 5, the first gas receiver 6, the first threeway 7,
Second threeway 8, main brake valve 9, it is right after brake chamber 10, off hind wheel 11, off hind wheel wheel speed sensors 12, the first relay valve 13,
Parking brake 14, four-way 15, it is right before brake chamber 16, off-front wheel 17, off-front wheel wheel speed sensors 18, the first ABS solenoid valve 19, third
Threeway 20, the first check valve 21, the 4th threeway 22, second one-way valve 23, the near front wheel 24, the near front wheel wheel speed sensors 25 are left front
Brake chamber 26, the 5th threeway 27, the 2nd ABS solenoid valve 28, proportion relay valve 29, the 6th threeway 30, bridge control valve 31, second after
Dynamic valve 32, standby pressure valve 33, left rear wheel wheel speed sensors 34, left rear wheel 35, left back gas chamber 36, the 7th threeway 37, third check valve
38, the 8th threeway 39, the 9th threeway 40, the 4th check valve 41, the tenth threeway 42 and center ECU 43.
The gas outlet of the air compressor 1 is connect with the air inlet of drier 2 by pneumatic circuit.
As shown in figure 3, it is four-loop protection valve air inlet 301 that four-loop protection valve 3, which has an air inlet, there are four tools
Gas outlet is respectively the first gas outlet of four-loop protection valve 302, the second gas outlet of four-loop protection valve 303, four-loop protection valve
The 4th gas outlet 305 of third gas outlet 304 and four-loop protection valve.Wherein, four-loop protection valve air inlet 301 and drier 2
Gas outlet pass through pneumatic circuit connect；The first gas outlet of four-loop protection valve 302 is blocked using plug, makes it not to outgoing
Gas；The second gas outlet of four-loop protection valve 303 is connect with one end of the first gas receiver 6 by pneumatic circuit；Four-loop protection valve
Third gas outlet 304 is connect with one end of the second gas receiver 5 by pneumatic circuit；The 4th gas outlet 305 of four-loop protection valve with
One end of third gas receiver 4 is connected by pneumatic circuit.
The other end of first gas receiver 6 is connect with the right end of the second threeway 8 by pneumatic circuit, the second gas receiver 5 it is another
One end is connect with the right end of the first threeway 7 by pneumatic circuit, and the other end of third gas receiver 4 and the upper end of four-way 15 pass through gas
Press piping connection.The lower end of first threeway 7 is connect with the left end of the 6th threeway 30 by pneumatic circuit.
As shown in Fig. 2, the tool of main brake valve 9 is 901 He of the first air inlet of main brake valve respectively there are two air inlet
The second air inlet of main brake valve 902, tool are the first gas outlet of main brake valve 904 and main brake valve second respectively there are two gas outlet
Gas outlet 905, and there is the automatically controlled port 903 of a main brake valve.Main brake valve the first air inlet 901 and the second threeway 8
Left end is connected by pneumatic circuit；The second air inlet of main brake valve 902 is connect with the left end of the first threeway 7 by pneumatic circuit；
The first gas outlet of main brake valve 904 is connect with second the first control mouth of relay valve 324 of the second relay valve 32 by pneumatic circuit；
The second gas outlet of main brake valve 905 is connect with second the second control mouth of relay valve 325 of the second relay valve 32 by pneumatic circuit.
As shown in figure 5, it is proportion relay valve air inlet 291 that the proportion relay valve 29, which has an air inlet,；Have
Two gas outlets, respectively the first gas outlet of proportion relay valve 292 and the second gas outlet of proportion relay valve 293；With one with
The proportion relay valve sensor interactive interface 296 of wheel speed sensors progress information exchange transmitting；It is logical with a support CAN bus
The proportion relay valve CAN interface 295 of letter；And there is the automatically controlled port 294 of a proportion relay valve.Proportion relay valve air inlet
291 are connect with the lower end of the second threeway 8 by pneumatic circuit；Proportion relay valve the first gas outlet 292 and the first ABS solenoid valve 19
Inlet end pass through pneumatic circuit connect；The second gas outlet of proportion relay valve 293 and the inlet end of the 2nd ABS solenoid valve 28 pass through
Pneumatic circuit connection.
The outlet side of first ABS solenoid valve 19 is connect with the right end of third threeway 20 by pneumatic circuit, third threeway 20
Upper end with it is right before the air inlet of brake chamber 16 connect by pneumatic circuit, the left end of third threeway 20 and the first check valve 21
Unidirectionally be not turned on end by pneumatic circuit connection, the one-way conduction end of the first check valve 21 and the upper end of the 4th threeway 22 pass through
Pneumatic circuit connection.The effect of first check valve 21 is to make braking system in conventional brake by its one-way conduction, before right
Gas in brake chamber 16 may not flow into left front brake chamber 26, guarantee that two brake chambers of front side can be realized independent pressure regulation
Braking.
The outlet side of 2nd ABS solenoid valve 28 is connect with the left end of the 5th threeway 27 by pneumatic circuit, the 5th threeway 27
Lower end connect with the air inlet of left front brake chamber 26 by pneumatic circuit, the left end of the 5th threeway 27 and second one-way valve 23
Unidirectionally be not turned on end by pneumatic circuit connection, the one-way conduction end of second one-way valve 23 and the lower end of the 4th threeway 22 pass through
Pneumatic circuit connection.The effect of second one-way valve 23 is to make braking system in conventional brake by its one-way conduction, left front
Gas in brake chamber 26 may not flow into before the right side in brake chamber 16, guarantee that two brake chambers of front side can be realized independent pressure regulation
Braking.
As shown in figure 8, it is the second relay valve air inlet 321 that second relay valve 32, which has an air inlet,；Have
Two gas outlets, respectively second relay valve the first gas outlet 322 and second the second gas outlet of relay valve 323；There are two controls for tool
Donsole, respectively second relay valve the first control mouth 324 and second the second control mouth of relay valve 325.Second relay valve air inlet
321 are connect with the standby pressure valve gas outlet 332 of standby pressure valve 33 by pneumatic circuit；Second the first gas outlet of relay valve 322 and the 4th
The left end of threeway 22 is connected by pneumatic circuit；Second relay valve the second gas outlet 323 and the lower end of the 8th threeway 39 pass through gas
Press piping connection.
As shown in fig. 6, it is standby pressure valve air inlet 331 that the standby pressure valve 33, which has an air inlet,；With an outlet
Mouth is standby pressure valve gas outlet 332.With a standby automatically controlled port 333 of pressure valve.Standby 33 internal structure of pressure valve is a two-bit triplet
Solenoid valve, in the case where the standby automatically controlled port 333 of pressure valve is powered, standby pressure valve gas outlet 332 and the exhaust outlet being connected with atmosphere
Connection；In the case where being powered off for the automatically controlled port 333 of pressure valve, since spring return function acts on, pressed for pressure valve air inlet 331 and with standby
Valve air gate 332 is connected.Standby pressure valve air inlet 331 is connected with the left end of four-way 15 by pneumatic circuit, so as to third gas receiver 4
Interior high pressure gas can supply for standby pressure valve 33.
The air inlet of the parking brake 14 is connect with the right end of four-way 15 by pneumatic circuit, the gas outlet of parking brake 14 and the
First relay valve control mouth 134 of one relay valve 13 is connected by pneumatic circuit.
As shown in fig. 7, it is the first relay valve air inlet 131 that first relay valve 13, which has an air inlet,；Have
Two gas outlets, respectively first relay valve the first gas outlet 132 and first the second gas outlet of relay valve 133；With one
One relay valve control mouth 134.First relay valve air inlet 131 is connect with the lower end of four-way 15 by pneumatic circuit；First servo
The first gas outlet of valve 132 is blocked using plug；First relay valve the second gas outlet 133 and the upper end of the 8th threeway 39 pass through air pressure
Piping connection.
As shown in figure 4, there are two air inlets, respectively the first air inlet of bridge control valve 312 and bridge for the tool of bridge control valve 31
Control the second air inlet of valve 317；There are four gas outlets, respectively the first gas outlet of bridge control valve 311, the second gas outlet of bridge control valve for tool
318, the 4th gas outlet 316 of bridge control valve third gas outlet 313 and bridge control valve；With an automatically controlled interface 314 of bridge control valve；With one
A bridge control valve CAN interface 315 for supporting CAN bus communication；The bridge of information exchange transmitting is carried out with wheel speed sensors with one
Control valve sensor interactive interface 319.The first air inlet of bridge control valve 312 is connect with the upper end of the 6th threeway 30 by pneumatic circuit；
The second air inlet of bridge control valve 317 is connect with the lower end of the 6th threeway 30 by pneumatic circuit；The first gas outlet of bridge control valve 311 and
The left end of ten threeways 42 is connected by pneumatic circuit；Bridge control valve the second gas outlet 318 and the left end of the 7th threeway 37 pass through air pressure
Piping connection；Bridge control valve third gas outlet 313 and the 4th gas outlet 316 of bridge control valve are blocked using plug.
The upper end of tenth threeway 42 is connect with the air inlet of brake chamber 10 behind the right side by pneumatic circuit, the tenth threeway 42
The end that is unidirectionally not turned on of right end and the 4th check valve 41 is connect by pneumatic circuit, the one-way conduction end of the 4th check valve 41 and the
The upper end of nine threeways 40 is connected by pneumatic circuit.The effect of 4th check valve 41 is to make braking system by its one-way conduction
In conventional brake, the gas behind the right side in brake chamber 10 may not flow into left back brake chamber 35 system, guarantee that rear side two is braked
Gas chamber can be realized independent pressure regulation braking.
The lower end of 7th threeway 37 is connect with the air inlet of left back brake chamber 35 by pneumatic circuit, the 7th threeway 37
The end that is unidirectionally not turned on of right end and third check valve 38 is connect by pneumatic circuit, the one-way conduction end of third check valve 38 and the
The lower end of nine threeways 40 is connected by pneumatic circuit.The effect of third check valve 38 is to make braking system by its one-way conduction
In conventional brake, the gas in left back brake chamber 35 may not flow into behind the right side in brake chamber 10 system, guarantee that rear side two is braked
Gas chamber can be realized independent pressure regulation braking.
The right end of 9th threeway 40 is connect with the left end of the 8th threeway 39 by pneumatic circuit.
First wheel speed sensors 12 are located on off hind wheel 11, and effect is to monitor the wheel speed of off hind wheel 11 in real time,
To realize the ABS control of off hind wheel；Second wheel speed sensors 18 are located on off-front wheel 17, and effect is real time monitoring off-front wheel
17 wheel speed, to realize the ABS control of off-front wheel；Third wheel speed sensors 25 are located on the near front wheel 24, and effect is real-time
The wheel speed of the near front wheel 24 is monitored, to realize the ABS control of left rear wheel；Fourth round speed sensor 34 is located on left rear wheel 35,
Effect is to monitor the wheel speed of left rear wheel 35 in real time, to realize the ABS control of left rear wheel.
As shown in Figure 1, being electrically connected as shown in figure 1 shown in short dash line, CAN bus connection is as shown in figure 1 shown in long dotted line.Described
Center ECU 43 is respectively with the automatically controlled port 903 of main brake valve, the automatically controlled interface 314 of bridge control valve, for the automatically controlled port 333 of pressure valve, ratio
The automatically controlled end of the automatically controlled port 294 of relay valve, the automatically controlled end of the first ABS solenoid valve 19 and the 2nd ABS solenoid valve 28 uses and is electrically connected
It connects, above-mentioned valve is realized so as to center ECU unit 43 and is controlled electronically.Center ECU 43 respectively with proportion relay valve CAN interface 295
It is connected with bridge control valve CAN interface 315 by CAN bus, to realize the information exchange in CAN protocol.First wheel speed sensors
12 and the second power connection end on wheel speed sensors 18 with proportion relay valve sensor interactive interface 296 using being electrically connected, so as to reality
Information transmission on existing sensor；Power connection end and bridge control valve on third wheel speed sensors 25 and fourth round speed sensor 34 sense
Device interactive interface 319 is using electrical connection, to realize that the information on sensor is transmitted.
In conjunction with the specific structure of the above-mentioned air-pressure electric-control braking system with fail safe function, the present invention also provides one
Kind has the air-pressure electric-control braking method of fail safe function, and the braking method includes conventional brake method, parking braking side
Method and actual effect braking method, are specifically described as follows respectively:
1. detailed process is as follows for conventional brake method:
Refering to Fig. 9, when air-pressure electric-control braking system of the present invention work is under conventional brake state, center ECU 43
Send control signal to coupled each valve body: the proportion relay valve 29 of bridge is powered before controlling, and makes its air inlet and gas outlet
Conducting；The bridge control valve 31 for controlling rear axle is powered, its air inlet is connected with gas outlet；It controls standby pressure valve 33 to be powered, makes its outlet
Mouth is connected with exhaust outlet, and is directly connected with atmosphere；The work of main brake valve 9 is controlled in automatically controlled mode, makes its air inlet and outlet
Mouth is not turned on.
The high pressure gas in air compressor 1 is air-dried by drier 2 at this time, thus by pneumatic circuit into
Enter in four-loop protection valve 3；High pressure gas in four-loop protection valve 3 enters in the first gas receiver 6 by the second gas outlet, then
Enter in the proportion relay valve 29 of preceding bridge by the second threeway 8, at this time since proportion relay valve 29 is in energization on state, than
High pressure gas in example relay valve 29 passes sequentially through the first ABS solenoid valve 19, third threeway 20 enter it is right before in brake chamber 16,
Realization builds pressure to the braking of off-front wheel；High pressure gas in proportion relay valve 29 passes sequentially through the 2nd ABS solenoid valve the 28, the 5th 3
Logical 27 enter in left front brake chamber 26, and realization builds pressure to the braking of the near front wheel.Due to the first check valve 21 and second one-way valve
23 one-way conduction, makes braking system in conventional brake, guarantees that left front brake chamber 26 can with brake chamber 16 before the right side
Realize independent pressure regulation braking.
High pressure gas in four-loop protection valve 3 enters in the second gas receiver 5 by third gas outlet, using the one or three
Logical 7 enter in the bridge control valve 31 of rear axles, since bridge control valve 31 be in energization on state, in high pressure gas pass through the 13rd
After logical 42 entrance is right in brake chamber 10, realization builds pressure to the braking of off hind wheel；High pressure gas in bridge control valve 31 passes through the 7th
Threeway 37 enters in left back brake chamber 36, and realization builds pressure to the braking of left rear wheel.Unidirectionally due to third check valve 38 and the 4th
The one-way conduction of valve 41, makes braking system in conventional brake, guarantees left back brake chamber 36 and 10 energy of brake chamber behind the right side
Enough realize independent pressure regulation braking.
First wheel speed sensors 12 monitor the wheel speed of off hind wheel 11 in real time, and are fed back to center ECU unit 43, pass through
Corresponding control signal is sent to bridge control valve 31 after analytical calculation, to realize the ABS control of off hind wheel；Second wheel speed sensors 18
It monitors the wheel speed of off-front wheel 17 in real time, and is fed back to center ECU unit 43, to the first ABS electromagnetism after being calculated analytically
Valve 19 sends corresponding control signal, to realize the ABS control of off-front wheel；Third wheel speed sensors 25 monitor the near front wheel 24 in real time
Wheel speed, and be fed back to center ECU unit 43, send corresponding control to the second ABS solenoid valve 28 after being calculated analytically
Signal processed, to realize the ABS control of the near front wheel；Fourth round speed sensor 34 monitors the wheel speed of left rear wheel 35 in real time, and it is anti-
Center ECU of feeding unit 43 sends corresponding control signal to bridge control valve 31 after being calculated analytically, to realize left rear wheel
ABS control.
Air pressure flow graph under air-pressure electric-control braking system conventional brake state of the present invention is as shown in thick line in Fig. 9.
2. detailed process is as follows for parking braking method:
Refering to fig. 10, when air-pressure electric-control braking system of the present invention work is under parking braking state, automobile at this time
By the control of parking brake 14, control for brake only is carried out to vehicle rear axle.Center ECU unit 43 is sent to coupled each valve body
Control signal: the bridge control valve 31 of the proportion relay valve 29 of bridge and rear axle powers off before controlling, and the air inlet for making the two and gas outlet are not
Conducting；It controls standby pressure valve 33 to be powered, its gas outlet is connected with exhaust outlet, and be directly connected with atmosphere；Control 9 work of main brake valve
Make to be not turned on its air inlet with gas outlet in automatically controlled mode；Parking brake 14 is in the open state due to driver's parking operation.
The high pressure gas in air compressor 1 is air-dried by drier 2 at this time, thus by pneumatic circuit into
Entering in four-loop protection valve 3, the high pressure gas in four-loop protection valve 3 enters in third gas receiver 4 by the 4th gas outlet, then
It is respectively enterd by four-way 15 in the air inlet of parking brake 14 and the air inlet of the first relay valve 13, since parking brake 14 is in open shape
State is opened 13 spool of the first relay valve, is made so high pressure gas enters by parking brake 14 in the control mouth of first relay valve 13
The air inlet of first relay valve 13 is connected with gas outlet, and high pressure gas successively passes through the first relay valve 13, the 8th threeway the 39, the 9th
Enter after threeway 40, the 4th check valve 41, the tenth threeway 42 it is right after in brake chamber 10, the parking braking of off hind wheel is built in realization
Pressure；High pressure gas successively passes through the first relay valve 13, the 8th threeway 39, the 9th threeway 40, third check valve 38, the 7th threeway 37
Enter in left back brake chamber 36 afterwards, realization builds pressure to the parking braking of left rear wheel.
Air pressure flow graph under air-pressure electric-control braking system parking braking state of the present invention is as shown in thick line in Figure 10.
3. failing, detailed process is as follows for braking method:
Refering to fig. 11, when braking system power-off failure, for center ECU unit 43 due to power-off, whole electric control circuit is whole
Failure.9 inner spool return of main brake valve at this time, the air inlet of main brake valve 9 is conducted with gas outlet at this time.
The high pressure gas in air compressor 1 is air-dried by drier 2 at this time, thus by pneumatic circuit into
Enter in four-loop protection valve 3.High pressure gas in four-loop protection valve 3 enters in the first gas receiver 6 by the second gas outlet, then
Enter in the first air inlet of main brake valve 9 by the second threeway 8；High pressure gas in four-loop protection valve 3 goes out by third
Port enters in the second gas receiver 5, enters in the second air inlet of main brake valve 9 using the first threeway 7.In main brake valve 9
High pressure gas flowed out from two gas outlets, and then flow into the second relay valve 32 two control mouths in, due to the second relay valve
32 control mouth is passed through high pressure gas, and spool is opened, and the air inlet of the second relay valve 32 is made to be conducted with two gas outlets.
Meanwhile the high pressure gas in air compressor 1 is air-dried by drier 2, thus by pneumatic circuit
Into in four-loop protection valve 3, the high pressure gas in four-loop protection valve 3 enters in third gas receiver 4 by the 4th gas outlet,
Enter in standby pressure valve 33 using four-way 15.Due to the automatically controlled mouth power-off failure of standby pressure valve 33, so its air inlet and exhaust outlet
Conducting, high pressure gas pass through standby pressure valve 33 and flow into the air inlet of the second relay valve 32.
Then high pressure gas flows into the 4th threeway 22 from the first gas outlet of the second relay valve 32, using the first check valve
21, enter after third threeway 20 it is right before in brake chamber 16, realize that pressure is built in the failure braking of off-front wheel；Meanwhile high pressure gas from
First gas outlet of the second relay valve 32 flows into the 4th threeway 22, left using entering after second one-way valve 23, the 5th threeway 27
In preceding brake chamber 26, realize that pressure is built in the failure braking of the near front wheel.
High pressure gas flows into the 8th threeway 39 from the second gas outlet of the second relay valve 32, then successively passes through the 9th threeway
40, enter after the 4th check valve 41, the tenth threeway 42 it is right after in brake chamber 10, realize that pressure is built in off hind wheel failure braking；High pressure
Gas flows into the 8th threeway 39 from the second gas outlet of the second relay valve 32, then successively unidirectional by the 9th threeway 40, third
Enter in left back brake chamber 36 after valve 38, the 7th threeway 37, realizes that pressure is built in the braking of left rear wheel.
Air pressure flow graph under air-pressure electric-control brake system non-functional on-position of the present invention is as shown in thick line in Figure 11.
Claims (7)
1. a kind of air-pressure electric-control braking system with fail safe function, is made of pneumatic circuit and electric control circuit, gas circuit from
Air compressor (1) respectively enters third gas receiver (4), the second gas receiver (5) and the first storage after four-loop protection valve (3)
Inflator (6), it is characterised in that:
The pneumatic circuit includes conventional brake circuit, parking brake loop and failure brake circuit；
The failure brake circuit are as follows: after the first gas receiver (6) connects main brake valve (9) with the gas outlet of the second gas receiver (5)
It is connected with two control mouths of the second relay valve (32), the gas outlet of third gas receiver (4) connects standby pressure valve (33) afterwards with second
The air inlet of relay valve (32) is connected, a gas outlet of the second relay valve (32) be separately connected front vehicle wheel it is corresponding two it is unidirectional
It is connect after valve with two brake chambers of front vehicle wheel, it is corresponding that another gas outlet of the second relay valve (32) is separately connected rear wheel
Two check valves after connect with two brake chambers of rear wheel.
2. a kind of air-pressure electric-control braking system with fail safe function as described in claim 1, it is characterised in that:
The conventional brake circuit are as follows: the first gas receiver (6) gas outlet respectively with main brake valve (9) and proportion relay valve (29)
Air inlet is connected, and two gas outlets of proportion relay valve (29) pass through the first ABS solenoid valve (19), the 2nd ABS solenoid valve respectively
(28) be connected with two brake chambers of front vehicle wheel, the gas outlet of the second gas receiver (5) respectively with main brake valve (9) and bridge control valve
(31) air inlet is connected, and two gas outlets of bridge control valve (31) are connected by two brake chambers with rear wheel respectively, preceding,
The independent pressure regulation system of two brake chambers is realized by two check valve connections between corresponding two brake chambers of rear wheel
It is dynamic.
3. a kind of air-pressure electric-control braking system with fail safe function as described in claim 1, it is characterised in that:
The parking brake loop are as follows: third gas receiver (4) gas outlet respectively with parking brake (14) and the first relay valve (13) into
Port is connected, and the gas outlet of parking brake (14) is connected with another air inlet of the first relay valve (13), and the first relay valve (13) goes out
Port is connect after being separately connected corresponding two check valves of rear wheel with two brake chambers of rear wheel.
4. a kind of air-pressure electric-control braking system with fail safe function, feature as described in claim 1-3 any one
It is:
The electric control circuit is by center ECU (43), two ABS solenoid valves (19), four wheel speed sensors, main brake valve (9), ratio
Example relay valve (29), bridge control valve (31) and standby pressure valve (33) form, center ECU (43) respectively with the automatically controlled port of main brake valve
(903), the automatically controlled interface of bridge control valve (314), the standby automatically controlled port of pressure valve (333), the automatically controlled port of proportion relay valve (294), two ABS
The automatically controlled end of solenoid valve is connected；Center ECU (43) respectively with proportion relay valve CAN interface (295) and bridge control valve CAN interface
(315) it is connected by CAN bus；Corresponding two wheel speed sensors of front-wheel and proportion relay valve sensor interactive interface (296)
It is connected.
5. a kind of air-pressure electric-control braking method with fail safe function, it is characterised in that:
The braking method includes conventional brake method, parking braking method and failure braking method；
The failure braking method detailed process are as follows:
When under braking system power-off failure state, main brake valve (9) and standby pressure valve (33) are both turned on；
High pressure gas in air compressor (1) enters the first gas receiver (6), the second gas receiver after four-loop protection valve (3)
(5) and in third gas receiver (4), the gas for entering the first gas receiver (6) and the second gas receiver (5) at this time passes through main brake valve
(9) control mouth for entering the second relay valve (32), is connected the second relay valve (32), and the gas into third gas receiver (4) passes through
Cross the air inlet for entering the second relay valve (32) for pressure valve (33)；High pressure gas is flowed from a gas outlet of the second relay valve (32)
Enter after a check valve respectively in two brake chambers of front-wheel out, realizes that pressure is built in the braking of the failure to two front-wheels；
High pressure gas flows out respectively after a check valve into two of rear-wheel from another gas outlet of the second relay valve (32)
In brake chamber, realize that pressure is built in the braking of the failure to two rear-wheels.
6. a kind of air-pressure electric-control braking method with fail safe function as claimed in claim 5, it is characterised in that:
The conventional brake method detailed process are as follows:
When braking system work is under conventional brake state, proportion relay valve (29) energization of bridge is led before center ECU (43) controls
Logical, the bridge control valve (31) for controlling rear axle, which is powered, to be connected, and control standby pressure valve (33), which is powered, to be connected and be directly connected with atmosphere, is controlled and is made
Dynamic main valve (9) work is not turned on control main brake valve (9) in automatically controlled mode；
High pressure gas in air compressor (1) enters the first gas receiver (6) and the second gas receiver after four-loop protection valve (3)
(5) in, at this time into the first gas receiver (6) gas by after proportion relay valve (29), respectively after an ABS solenoid valve
Into in two brake chambers of front-wheel, realization builds pressure to the conventional brake of two front-wheels；Into the gas of the second gas receiver (5)
It after bridge control valve (31), respectively enters in two brake chambers of rear-wheel, realization builds pressure to the conventional brake of two rear-wheels；
In the above process, after the wheel speed signal that center ECU detects the wheel speed sensors of four wheels is handled, respectively to
The ABS solenoid valve of preceding bridge and the bridge control valve of rear axle send corresponding control signal, and then realize the abs braking control to four wheels
System；
Two check valves between two brake chambers of front-wheel between two brake chambers of rear-wheel by installing opposite to each other
One-way conduction, realize that independent pressure regulation is braked between two brake chambers.
7. a kind of air-pressure electric-control braking method with fail safe function as claimed in claim 5, it is characterised in that:
The parking braking method detailed process are as follows:
When braking system work is under parking braking state, automobile only carries out braking control to vehicle rear axle by parking brake (14) at this time
System, the power-off of the bridge control valve (31) of the proportion relay valve (29) of bridge and rear axle is not turned on before center ECU (43) controls, and controls standby pressure valve
(33) it is powered and is connected and is directly connected with atmosphere, control main brake valve (9) work makes to control main brake valve (9) in automatically controlled mode
It is not turned on；
High pressure gas in air compressor (1) enters in third gas receiver (4) after four-loop protection valve (3), then respectively into
In the air inlet for entering parking brake (14) and the first relay valve (13), parking brake (14) high pressure gas is flowed through into the first relay valve (13)
In control mouth, the first relay valve (13) spool is connected, the high pressure gas for flowing through the first relay valve (13) passes through a list respectively
Enter in two brake chambers of rear-wheel after to valve, realization builds pressure to the parking braking of two rear-wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430758.2A CN107054332B (en) | 2017-06-09 | 2017-06-09 | A kind of air-pressure electric-control braking system and braking method with fail safe function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710430758.2A CN107054332B (en) | 2017-06-09 | 2017-06-09 | A kind of air-pressure electric-control braking system and braking method with fail safe function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107054332A CN107054332A (en) | 2017-08-18 |
| CN107054332B true CN107054332B (en) | 2018-12-21 |
Family
ID=59617794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710430758.2A Expired - Fee Related CN107054332B (en) | 2017-06-09 | 2017-06-09 | A kind of air-pressure electric-control braking system and braking method with fail safe function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107054332B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107839672A (en) * | 2017-11-16 | 2018-03-27 | 吉林大学 | A kind of air-pressure brake energy-recuperation system and its control method |
| CN108622060B (en) * | 2018-05-09 | 2021-03-02 | 浙江正创科技有限公司 | Electric control air brake bridge valve |
| CN108515954A (en) * | 2018-05-09 | 2018-09-11 | 浙江荣众机械有限公司 | Commercial car double mode Pneumatic braking system |
| CN108556830B (en) * | 2018-05-24 | 2023-10-10 | 湖南汽车工程职业学院 | Control method of electric control pneumatic automobile braking system |
| CN109050508A (en) * | 2018-07-23 | 2018-12-21 | 南京金龙客车制造有限公司 | A kind of car tailgating-proof system and its control method |
| CN110588609B (en) * | 2019-09-20 | 2021-04-13 | 北京易控智驾科技有限公司 | Unmanned vehicle braking system and unmanned vehicle |
| CN111055828B (en) * | 2019-12-31 | 2021-02-02 | 威伯科汽车控制系统（中国）有限公司 | Redundant braking system supporting full automatic driving of commercial vehicle |
| CN111267817A (en) * | 2020-02-22 | 2020-06-12 | 吉林大学 | Air pressure braking system for service braking failure protection |
| CN114701459A (en) * | 2022-04-07 | 2022-07-05 | 福建中科云杉信息技术有限公司 | Redundant braking system and accurate parking method for low-speed automatic driving commercial vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200939875Y (en) * | 2006-05-29 | 2007-08-29 | 吉林大学 | Electronic controlled braking system for medium heavy duty automobile |
| WO2012049649A1 (en) * | 2010-10-13 | 2012-04-19 | Agricultural And Industrial Mechanisation Group (Proprietary) Limited | Fail-safe brake system |
| CN202368556U (en) * | 2011-12-14 | 2012-08-08 | 北汽福田汽车股份有限公司 | Rear axle brake system of vehicle |
| CN202686347U (en) * | 2012-07-11 | 2013-01-23 | 北京理工大学 | Energy feedback active control air braking system |
| CN105365805A (en) * | 2014-08-26 | 2016-03-02 | 王勤黄 | Pneumatic braking system capable of preventing vehicle from having malfunctions |
| CN206781738U (en) * | 2017-06-09 | 2017-12-22 | 吉林大学 | A kind of air-pressure electric-control brakes with fail safe function |
-
2017
- 2017-06-09 CN CN201710430758.2A patent/CN107054332B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200939875Y (en) * | 2006-05-29 | 2007-08-29 | 吉林大学 | Electronic controlled braking system for medium heavy duty automobile |
| WO2012049649A1 (en) * | 2010-10-13 | 2012-04-19 | Agricultural And Industrial Mechanisation Group (Proprietary) Limited | Fail-safe brake system |
| CN202368556U (en) * | 2011-12-14 | 2012-08-08 | 北汽福田汽车股份有限公司 | Rear axle brake system of vehicle |
| CN202686347U (en) * | 2012-07-11 | 2013-01-23 | 北京理工大学 | Energy feedback active control air braking system |
| CN105365805A (en) * | 2014-08-26 | 2016-03-02 | 王勤黄 | Pneumatic braking system capable of preventing vehicle from having malfunctions |
| CN206781738U (en) * | 2017-06-09 | 2017-12-22 | 吉林大学 | A kind of air-pressure electric-control brakes with fail safe function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107054332A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107054332B (en) | A kind of air-pressure electric-control braking system and braking method with fail safe function | |
| CN101331042B (en) | Electro-pneumatic brake control device | |
| JP2009518238A (en) | Electro-pneumatic braking control device | |
| CN200939875Y (en) | Electronic controlled braking system for medium heavy duty automobile | |
| CN111055828B (en) | Redundant braking system supporting full automatic driving of commercial vehicle | |
| CN102470848B (en) | For vehicle brake apparatus controller and there is the brake equipment of this controller | |
| CN108290563A (en) | Vehicle electric pneumatic type holding brake device with additional control loop | |
| CN106671964B (en) | Intelligent electronic parking system module assembly | |
| CN100422015C (en) | Pneumatically braking anti-lock brake system for mixed powered automobile | |
| CN207089288U (en) | A kind of electronic parking system based on air pressure redundancy | |
| CN107074213A (en) | Parking braking system | |
| CN206781738U (en) | A kind of air-pressure electric-control brakes with fail safe function | |
| CN107512260A (en) | A kind of electronic parking system based on air pressure redundancy | |
| CN2925986Y (en) | Stabilized electronic controlling system for medium-heavy automobile | |
| CN107512258A (en) | A kind of acting urgent braking system based on service brake and electronic brake | |
| CN105151021A (en) | Car braking automatic control system and control method having man-machine double driving and double control function | |
| US20220144235A1 (en) | Parking brake assembly with abs control for each individual wheel | |
| CN210310369U (en) | Trolley bus braking system and trolley bus | |
| CN207790665U (en) | A kind of automatic emergency brake system | |
| CN207725229U (en) | A kind of air pressure type braking energy recovery system | |
| CN207916833U (en) | A kind of commercial car intelligent anticollision security system brake module | |
| CN210000310U (en) | tractor parking device | |
| CN208181038U (en) | A kind of brake energy recovering system with fail safe | |
| CN208164970U (en) | A kind of brake energy recovering system with fail safe | |
| CN208181036U (en) | A kind of brake energy recovering system with fail safe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181221 Termination date: 20210609 |